Polder

Example
The height difference between the land in the polder and the water is the key to the design [https://books.google.cl/books?id=39lGO7VD3Z8C&pg=PA394&dq=Polder+english&hl=es-419&sa=X&ved=0ahUKEwizj-uyscrgAhXvFLkGHUZrDKwQ6AEITjAF#v=onepage&q=Polder%20english&f=false BC AD (English edition). Benthem Crouwel 1979-2009]